Manufacture of slag



(No Mozdel.) l I sT. GEORGE T. o. BRYAN..

l MANUFAGTUREOP SLAG. No. 400,048.- Patented Mar. 26, 1889.

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INVENTOR 5%. G00?" 617. 0.132" 602 Byko's' .dttorney "y j l UNITED *STATESo PATENT OFFICE.

' sT. GEoRGE T. c. BRYAN, or BIRMINGHAM, ALAnA.

MANUFACTURE oF sLAc.

SPECIFIGATIN forming part of Letters Patent N o. 400,048, dated March 26, 1889.

l Application filed July 26, 1888. Serial No. 281,094. (No model.)

To all whom it may concern.-

Be it known that I, ST. GEORGE T. C. BRYAN, of Birmingham, in the county of Jefferson and State of Alabama, have invented a new and useful Manufacture of Floors, Pavement s, lValls, &c., from Slag,of which the following is a specication, reference being had to the accompanying drawings.

To carry out my invention, Iproduce masses of slag in part vcellular and in part solid.-

From such slag blocks can lbe cut (or they may be molded) of any requireddimensions,

either cellular or solid, or each in part cellu-v manufacture it`is that it is a uniform, light, strong, elastic, durable substance, readily molded, and also easily cut or sawed, for the `purposes of making pipe, blocks for paving or building, &c. These, before |or when laid in place, may be covered with any substance that will enter the pores, and thus form a perfect bond with and also. furnish a protection and finish to the surfaces lof the slag when desired. By means of the cells which contain the cement two closely-fitting surfaces of vporous slag may be firmly united with one another without necessarily any intervening space for the cement. Itis a matterof great importance that the bond and viixedness between the upper or outer layer (material used to cover the slag) and the base or substructure be as intimate aspossible. According to `my invention such bond is Inade more intimate and fixed thanis the union of any other form ,of stone, block, or other solid base not fused with a plastic or mobile covering that l am aware of, for the cell structure offers the greatest exposed surface of slag for bond with represents a mass of slag solid in its lower part and cellular in its upper part. Fig." 2 is a sectional view of a pavement or wall made from blocks eut from said mass of slag and covered with cement or other plastic substance. Fig. 3 shows two pieces of cellular slag placed in contact and united 'by a bond of plastic substance at F.

, Referring to the letters upon the drawings, A in' Fig. l indicates a-mass of slag solid at the-base B and cellular in its upper part, C. Such a mass of slag may be molded in any desired form, or it may be cast in' bulk and then sawed into any desired form.

ln order to Inake a mass or block of slag solid in one part and cellular in another there are several-methods which may be practiced,

some of which l will mentions First. Slag in part solid and in part'cellular may be produced by discharging upon molten or semi-molten or heated solid slag molten cellular slag, the conditions of fusion andtemperature beingsuch that union will take placel between the surfaces of these masses.

Second. Slag in part solid and in part cellular may be produced through the action of centrifugal force, in which, by revolving or rotating the vessel or mold containing cellular slag, or by rotation of the slag in the vessel or mold, it will, because of its superior weight and density under the Xinuence of centrifugal force, displace the gas or vapor cells near to the walls of the containing-vesd sel and make a solid exterior crust.

Third. Slag in part solid and in part cellular may be produced by discharging molten slag into a vessel or mold, which may contain,

in' addition to its confining walls, partitions,

all of which may be solid or hollow, fixed or movable, and which may be heated as desired and found best. The exterior or containing walls serve the purpose, in connection with the interior partitions, of.. chilling and making solid the contiguous portions of the slag. The molten slag discharged into such a vessel or mold may be allowed to chill, forming a solid crust on all the walls before the interior slag is made cellular by blowing or liberating vapor, gas, ttc., into it and intermingling it through the molten mass.

Fourth. Slag in part solid and in part cellu- IOO lar may be produced by discharging cellular slag, made so by gaseous or vapor expansion in the molten mass, into a mold when the viscid condition oll the slag is such as to in a slight degree allow the upward rise of the Vgas or vapor cells and the subsidence of solid slag, by which means the bottom will become solid and the upper portion remain cellular. In Fig. 2 D indicates a base of slag, and E a plastic ,covering At F is seen how the plastic substance penetrates the cells of the slag,` and forms a bond, as if the two parts were bolted together. This advantage applies to floors, Walls, Vand pavements alike.

Blocks of slag partly solid and partly cellular may of themselves forni an excellent pavement, the cellular part serving to lighten the blocks and render their transportation.

and handling convenient, and the solid part may form a surface offering greater resistance to Wear and breakage, and beingl smoother for the purposes, Jfor example, ol a 1. As a new article of manufacture, an arp tificial paving or building' block of slagnnade in part solid and in part cellular, snbstanially as set forth.

2. The combination, with a cellular articial block of slag made for paving or building purposes, of a plastic substance or covering` forming a bond with the 'slag by entering` its cells, substantially as set forth.

lintestimony of all Which l have hereunto subscribed my name.

ST. GEORGE T. (i. BRYAN.

Witnesses:

JosEPI-I L. ATKINs, ,EMMA M. GILLETT. 

